SYMPOSIA PAPER Published: 01 January 1998

Study on the Limited Hardenability Steel


A series of measurements were taken in the limited hardenability bearing steel rings which were induction hardened and tempered. Measurements showed several features which strengthened the rings: (1) Compressive residual stress are generated from surface to a depth of 3.2mm and high residual compressive stress at the location where fatigue fracture initiates. (2) The matrix of the hardened layer was composed mainly of lath martensite with dispersed carbides whose formula was Me3 according to the X-ray spectrum analysis. The carbon content of martensite was estimated to be lower than 0.58% (by weight). The core was constituted of troostite transformed from spheroidal parbide. (3) The amount of retained austenite in the hardened layer was about 5% (in volume) which ensures the high dimensional stability of bearing.

Author Information

Xu, LP
Shanghai University, Shanghai, P.R.China
Li, L
Shanghai University, Shanghai, P.R.China
Min, YA
Shanghai University, Shanghai, P.R.China
Xu, MH
Shanghai No.5 Steel CO. LTD., Shanghai, P.R.China
Le, JP
Shanghai No.5 Steel CO. LTD., Shanghai, P.R.China
Liu, RH
Shanghai No.5 Steel CO. LTD., Shanghai, P.R.China
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Developed by Committee: A01
Pages: 321–332
DOI: 10.1520/STP12137S
ISBN-EB: 978-0-8031-5381-3
ISBN-13: 978-0-8031-2421-9